Book-indexing.



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S W E @d ab f u. w w W 1 7, U @w 070 W o. .JMW N Patented April 11, 1905.

UNTTED STATES PATENT @mica RICHARD C. POI'IL, OF DETROIT, MICHIGAN.

BOOK-INDEXING.

SPECIFICATION forming part of Letters Patent No. 787,111, dated April 11, 1905.

Application tiled December 19, 1904. Serial No. 237,389.

Be it known that I, biouxnp C. PouL, a citi- Zen ol the United States, residing at Detroit, county ot' lYayne, State ot' Michigan, have invented a certain new and useful Improvement in l) ook-Indexing: and I declare the following to be a t'nll, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being' had to the accompanying drawings, which form a part ot this specil'ication.

This invention relates to book-imlexing.

It has t'or its object improved marginal indications and means t'or preparing marginal indications on the leaves ot a book. which indications, taken in connection with characters l printed along an edge ot' the lirst leat' oll the book, enable the user to open the book at that part ot it where the mattei' he desires to reler to is contained.

Another feature of improvement relates to the spacing' or delining character ot' the index, which points out or indicates at once the limits ot' specilic parts ot' the book as, for example, it the index be alphabetical and the entire book be divided into portions, each one ot' which is allotted to a single letter ot' the alphabet. The indicating-marks, which are on the edge ot' the book, deline the boundaries ot' the portion allotted to that letter. A

clear umlerstamling ot this will be. made apparent by the description which follows.

In the drawings` Figure 1 is a perspective rlmresentation ot' a book indexed and marked according to this invention. Fig, 2 is a perspective showing the margins ot' a tew ot the leaves ot the book. the index characters on the back fly-leaf.

The drawings illustrate a book divided into sections` ot' which each section is devoted to subjects which may be relerred to under an indicating alphabetical character. The leaves ot the book included in each section are provided on the margin and lor a space back Vt'rom the margin with imprints ot a color that contrasts with the color ot the paper ot the book. This imprint is made at a point along' the edge and properly located between the Fig. 3 shows a book with top to the bottom thereof to be opposite the proper indicating alphabetical character on the margin ol the lirst page ot' the book. The number ot' the leaves in each section may vary trom the number of leaves in any other section or may be equal thereto, as the necessities ot the work require. The imprint is prei"- erably made on both sides ot' the paper.

The distinguishing' color extending across the edges ot' all the leaves ot a section indicate at once the limits ot' the section, and because the distinguishing color is printed back from the margin along the surt'ace of the page, as well as at the extreme edge, the limits and extent ol the section becomes stiil more apparent and well delined when the user bends the book and causes the shil'ting ol the leaves in the process ol' opening the book.

The imprint ol' the color upon the book is accomplished at the same time with the print ot' the page by inserting printing-blocks at the proper places to make the necessary imprint, and this may be done with suliicient accuracy, so that when the book is trimmed after binding' the imprint is exposed without further labor. Consequently the oost ol'I proflucing a hook indexed in accordance with this invention is merely nominal and requires neither handling ot the book or any other imprint than that made in the process ol printing the book itselt'.

I am aware ol the patent, No. 101,291, issued May Q8, 188), to lVilliam M. Lester, in which he showed and described a method ol: indexing books by marking on the combined edges ot' the leaves conligurations having' a width correspomling to the coi'nhined widths ot the leaves comprising the subject-matter ot a section ot' the book," but this required additional operation al'ter the book was bound, and it produced only avery slight indicatingmark which was upon the extreme edge ol" the leatI and which became indistinct as the leal was bent and which` moreover, in actual use was with great diliiculty conlined to the exact limits desired, either being' made too wide, it' the subject contained few leaves, or too narrow it' it contained many leaves,where as with the invention herein described the limits of the indicating-imprint are always exact and the imprint becomes more apparent and pronounced as the leaves are bent.

That I claim is l. An index for books, having in combination with indicating characters on the free edge of the fly-leaf, imprints on each of the leaves of a section devoted to a subject and extend ing to the margin thereof, each imprint being in the same location on its page that the indicating character therefor occupies on the fly-leaf, substantially as described.

2. An index for books having in combina- 

